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Mac OS X 10.6 with Firefox 30. Issues with LI Dropdown menus. Menus do not display at all.

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We have a horizontal navigation menu in our application. The dropdowns are constructed using a UI LI menu. This used to work in all browsers up until a few days ago. Now the dropdown will not display. Only the top level menu. The user has Mac OS X Server V10.6 Snow Leopard.

We have a horizontal navigation menu in our application. The dropdowns are constructed using a UI LI menu. This used to work in all browsers up until a few days ago. Now the dropdown will not display. Only the top level menu. The user has Mac OS X Server V10.6 Snow Leopard.

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Did you check the Web Console (Firefox/Tools > Web Developer) for error messages about this issue?

Is this done via CSS or via JavaScript?


The first to try is usually to clear the cache and cookies from websites that cause problems.

"Clear the Cache":

  • Firefox > Preferences > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox > Preferences > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"
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Didn't check the Web Console. It is CSS.

User did clear cache, cookies etc.